Periodic Table KS3

4. This group 7 element kills bacteria in swimming pools. (8)
7. The reactivity of these elements _______________ as you go down the group. (9)
8. These elements are all good conductors of electricity. (6)
9. This physical property means metals can be hammered into shape. (9)
10. This gas is used in respiration. (6)
13. The alkaline product formed when sodium reacts with water. (6,9)
15. This element is in periodic 4 and group 7. (8)
18. The vertical columns are called _________. (6)
19. Elements found in Group 1 of the periodic table. (6,6)
20. The horizontal rows are called _________. (7)

1. Elements in the periodic table are arranged by _______ ________. (6,6)
2. The surname of the scientist who rearranged the order of elements in the periodic table. (9)
3. This metal is used in electrical wiring. (6)
5. Elements found in Group 7 of the periodic table. (8)
6. Group 0 elements have this property because their atoms have full outer energy levels(shells). (9)
11. This metal is used to make jewellery. (4)
12. This group 0 element is used in party balloons. (6)
14. This physical property means metals can be drawn into wires. (7)
16. This chemical property decreases as you go down Group 7. (10)
17. Elements found in Group 0 of the periodic table. (5,5)